Phone Lags after root and Greenify Problem topic

I just rooted my N910C and i noticed it lags? i try to install Greenify and also it lags sometimes it wont even ask for SuperSU access and i tried turning off the power saving and even if its off the icon on status bar is still there. another thing is that when i install greenify i can't un install it normally i tried on google store and the only option is Deactivate. i tried uninstalling it via "Drag icon and drag to the trash can icon" and it says that i need to disable the administrator access and i tried unchecking it but it lags. so what i did was uninstall it via titanium back up and it worked. but still my phone lags any suggestion?

Material Accent Lags on KitKat topic

I don't know if anyone else is having issues with harsh lag after Material reached certain apps on stock 4.4.4... But I found a remedy which seems to work for me. If you aren't running it already, simply switch runtime to ART. The stutterfest ended for me in these apps after switching:
Hangouts (Was almost unusable on Dalvik)
Gmail
Inbox by Google
Shuttle+ Music Player
Google Play Music
Google+ (subtle)
Tumblr (not extremely laggy like before but a deal smoother)
YouTube (WOW)

Google Calendar still hiccups really bad, Chrome had no change, Google Earth didn't either, Google Keep also the same. I can't imagine what 4.3- users are experiencing. No ART is an issue. It seems Lollipop optimization, mostly to accommodate the new runtime is hurting the way Dalvik handles apps. Hope this helps someone.

[Q] Andrdoid Studio lags topic

I installed Android Studio from the Arch User Repository today and every time I run it my PC slows down. When I first started a new project I had 2 youtube video open in Firefox and my PC stopped responding, had to restart it manually. Second time was a bit better, no forefox, but still it took an eternity to switch tabs.
Is there a way of improwing the performance? Is this a fault of missing softwtware or is my PC just too old [specs: 3 ghz dual core, 2 GB of RAM, HD4350, Manjaro linux with XFCE].